Specifications

ZVx Interfaces
1043.0009.50 A.3 E-8
Interface Functions
Instruments which can be remote controlled via the IEC bus can be equipped with different interface
functions. Table A-1 lists the interface functions appropriate for the instrument.
Table A-1 Interface functions
Control character Interface function
SH1 Handshake source function (source handshake), full capability
AH1 Handshake sink function (acceptor handshake), full capability
L4 Listener function, full capability, deaddressed by MTA.
T6 Talker function, full capability, ability to respond to serial poll, deaddressed by MLA
SR1 Service request function (Service Request), full capability
PP1 Parallel poll function, full capability
RL1 Remote/Local switch over function, full capability
DC1 Reset function (Device Clear), full capability
DT1 Trigger function (Device Trigger), full capability
C12 Controller function, capability to send interface messages, to accept or relinquish the
controller function
IEC Bus Messages
The messages transferred via the data lines of the IEC bus can be divided into two groups:
– interface messages
and
– instrument messages.
Interface Messages
Interface messages are transferred on the data lines of the IEC Bus when the "ATN" control line is
active (LOW). They are used for communication between controller and instruments and can only be
sent by the controller which currently has control of the IEC Bus.